<?php
    $a=array(
        3=>3,
        54=>54,53=>53,33=>33,43=>43,32=>32,31=>31,30=>30,37=>37
    );
    $b=array(
        312=>312,
        154=>154,3=>3,33=>33,43=>43,32=>32,31=>31,30=>30,37=>37
    );
    echo print_r($a).' '.print_r($b).' phep tru:'.print_r(array_diff($a,$b));
?>